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The Journal of rheumatology  (2012)

Comparison of the clinical expression of patients with ankylosing spondylitis from Europe and Latin America.

Benegas, Mariana; Muñoz-Gomariz, Elisa; Font, Pilar; Burgos-Vargas, Ruben; Chaves, José; Palleiro, Daniel; Maldonado Cocco, José; Gutiérrez, Miguel; Sáenz, Ricardo; Steckmen, Ivan; Rillo, Oscar; Mulero, Juan; Sampaio-Barros, Percival; Barcelos, Anabela; Vander Cruyssen, Bert; Vazquez-Mellado, Janitzia; Collantes Estevez, Eduardo